Machine for making satchel-bottom bags



Mam! 1.. BlscHoFF 2,192,177

MACHINE FOR MAKING SATCHEL-BOI'TOM BAGS 7 Filed Juri 23, 1936 s Sheets-Sheet 1 Y ATTORNEY.

March 5, 1940. L. BISCHOFF MACHINE FOR MAKING SATCHEL-BOTTOM BAGS Filed June 23, 1936 3 Sheets-Sheet 2 BY A W ATTORNEY.

L. BISCHOFF MACHINE FOR MAKING SATCHEL-BO'ITOM BAGS March 5, 1940.

5 sheets-sheet s Filed June 23, 1956 Patented M... .5, 1940 Ludwig -Bischofit', Brooklyn, N. Y., assignor to Oneida Paper Products, Inc., New York, N. Y., a corporation of New York Application June 23, 1936, Serial No. 86,750

Claims.

This invention relates primarily to machines for making satchel-bottom bags, and comprises more particularly mechanism for sealing the bottoms of such bags. Bags of this type are generally made by forming a web of paper into a tube by longitudinally foldingthe web and adhering'its edges to each other, after which the tube is divided into tubular blanks of the desired length, one end of each blank being closed to form a bag.

The particular apparatus of the present invention' is designed to receive a partially formed satchel-bottom bag, 1. e., a tubular blank segregated from the main tube and having a diamond fold formed at one end and lying in the .plane of the blank, to form a satchel bottom thereon and to seal the bottom by applying a patch thereto.

The present invention has particular utility in connection with the manufacture of bags formed of transparent cellulosic materials, but is not to be considered as limited to such materials. Much difiicultyhas been experienced in the manufacture of bags from such materials since these materials do not readily adhere to each other and powdered commodities tend to escape through the bottom closure. The presentinvention overcomes the difficulty heretofore encountered with such materials by not only forming an efficient closure, but by applying an efiicient sealing patch to cover the parts of the bottom closure at which leakage is most likely to occur. The sealing patch may be made of transparent .cellulosic materials when applied to bags of transparent cellulosic material, or may be of the same material as that used in any other bag, or different materials may be used in the patch and in the bag. An advantage of this construction is that a pleasing effect may be obtained by using colored patches, or advertising may be displayed thereon.

The present invention embodies means operating upon the diamond-folded end of a bag blank progressed bottom foremost through the machine,

first to crease both points of the diamond fold transversely of the bag in such a manner as to cause the points to project above the plane of the blank, secondly to grip. the leading point at its crease in such a manner as to insure its pro jecting upwardly above the plane of the blank, thirdly to whip the trailing point of the diamond fold down upon the intermediate portion thereof by mechanism traveling faster than the blank, fourthly to present the leading point of the diamond fold between convergent traveling surfaces whereby to press the leading point down upon the intermediate portion. of the diamond fold partially to cover the trailing point, and fifthly, in the process of performing these operations or subsequently thereto, to apply a patch to the bottom of the bag which covers the overlapped points of the diamond fold.

The mechanism operates in a continuous manner with proper synchronism of all parts whereby patches are adhesively secured to successive bag bottoms and the finished, sealed bags discharged from the machine in completed condition.

While the invention is particularly directed to apparatus for accomplishing the operations stated, there is nevertheless a new method by whichthese operations are performed.

Objects and advantages of the invention will be apparent from the hereinafter detailed deg scription and claims when read in conjunction with the, accompanying drawings wherein like parts are referred to by like numerals throughout.

, Referring to the drawings:

Fig. 1 is a diagrammatic showing of a machine accomplishing the present invention;

Fig. 21s a diagrammatic showing of part of a modified machine for accomplishing the present invention;

. Fig. 3 is a diagrammatic showing of the remaining portions of the machine partially shown in Fig. 2; l

Fig. 4 is'a plan view of a blank as progressively operated upon by the mechanism of Fig. 1;

Fig. 5 is a similar plan view showing the sequence of operations in the mechanism of Figs. 2 and 3;

Fig. 6 is a diagrammatic section of a portion of the mechanism of Fig. 1;

Fig. 7 is a detail View taken along line 1+1 of Fig. 1, looking in the direction of the arrows;

Fig. 8 is a view partly in section of a modified part which can be substituted for a part common to both modifications of the machine; and

. Fig. 9 is a cross-section taken on line, 9- -9 of Fig. 8.

In the manufacture of bags by the machine of Fig. 1, and according to the processdisclosed in Fig. 4, a bag blank 20 provided with a diamond fold 2| at one end lying in the plane of the'blank,

the points of which are provided with adhesive as. at 22, the folding of which and the application of adhesive thereto having been accomplished by known means common in the art, is introduced between tapes 25 and 26 traveling in the direction of the arrows, the diamond fold. of the blank being. foremost. The lower belts 26 pass about guide rolls located near to the surface of a revolving crimping drum 21, about a portion of which the bag is progressed while gripped against the surface of the drum by the tapes 25, which are spaced so as to engage the blank close to its longitudinal edges, and a tape 28 which is guided in a groove in the drum 2'! so as to engage the ope posite surface of the bag close to its center. A pair of crimping blades 29 upon a rotating shaft 30 cooperate with the crimping drum 21 to form creases 3| and 32 in the diamond-folded portion, thereby defining a leading point 33 and a trailing point 34 which by reason of the formationof the fold lines by the crimping blades naturally project upward above the plane of the blank between the tapes 25. The foremost crimping blade tucks the folded portion between a clamping surface 35 formed on drum 2? and a clamping blade 36 operated by a cam follower 51 and a fixed cam 38 to clamp the foremost crease immediately upon the formation thereof and positively carry the bag around the axis of the drum. The second creasing blade'29 presses against one of a series of rubber bars 39, each designed for a certain size of bag. Traveling chains 45 pass about the shaft 30 and are guided outside of tapes 25. Chains 40 carry a folding bar 4! extending transversely of the blank and traveling in the direction of the arrow at a higher rate of speed when adjacent the drum so that immediately after the fold line 32 is formed the folding bar 4! engages the upstanding point 34 and whips it down onto the main portion of the diamond fold where the adhesive 22 tends to retain it. Chains 40 pass about a guide roll 42 .and carries the car back to engage the next bag. Immediately after the bottom leaves the vicinity of guide roll 42 it is engaged between the surface of a transfer roll 45 and the surface of drum 2?, the surface of the transfer roll engaging the leading point 33 and pressing it down into overlapping engagement with the trailing point. Blade 35 is now released and the bag is held'between belt 28 and transfer roll 45 while the adhesive partially sets.

At the other side of roll 45 there is provided a feeding drum 46 rotating in the direction of the arrow and having associated therewith a stationary cam 41. Four sets of feeding fingers 48 are carried by the feeding drum 45, and are provided with cam followers 49 operating the fingers in accordance with the contour of a stationary cam 41. As the fingers 43 approach the nip between drum 4% and roll 45 they are held in raised position and fit into a recess 50 in the surface of the roll, The leading edge of the bottom of the bag is introduced under the tips of the feeding fingers 48 which immediately grip the bag. The bag is now progressed by the feeding drum 46 and the tapes 25 and 28 to a point adjacent a patch applying cylinder 55.

The patch applying cylinder is supplied with patches severed from a strip 56 unwound from a roll 51 by feed rolls 58 and 59. The strip passes about a fixed tensioning roll 60 and a movable slack-providing roll 6!, which is operated by a cam 52 fixed to a rotating knife carrier 53, in order that slack may be provided in the strip at the instant a patch is severed between the rotating blade 54 anda cooperating blade 65 operated by a-second cam 66 likewise rotating with the knife carrier 63. The foregoing patch cutter and slack providing means is the same as mechanism for accomplishing the same purpose disclosed in my prior United States Letters Pat-. ent No. 2,037,110, dated April 14, 1936. As the magazine 83,

patch 10 is separated from. the strip 56 it is fed between the surface of the knife carrier 63 and tapes ii engaging its longitudinal edges. The patch applying cylinder 55 is positioned between the knife carrier 63 and the feeding drum 46 and is provided with one or more fingers 72. operated by a stationary cam 13 to grip the leading edge of the patch (as shown in dotted outline), as in .15 of cam 4'! is of short extent so that as a patch is positioned over the bottom of the bag and released by finger H it is immediately clamped onto the bag bottom by the gripping fingers 48.

The patch is provided with adhesive before it reaches the bag by 'a conventional applying roll it engaging afountain roll 11.

The patch holding tapes 1| leave the surface of Q the feed drum 45 substantiallylas soon as gripping fingers 48 engage the bag and, the bag bottom with the patch applied thereto is then pressed between the surface of the drum 46 and 1 a pressing roll thereby assuring even application of the patch and its firm adherence to the bag. The tapes 25 then leave the surface of the feeding drum 46 and return to the initial point of introduction of bag blanks to the machine. The bag is now held between the surface ofthe drum 45 and the fingers 48. The

drum &5 is provided with grooves 15'! into which extend stationary strippers 82 mounted upon a the. surface of rol1'46 substantially parallel :to the strippers 82, which arrangement assists the strippers in positioning the leading edge of the The tape 28 extends away from bag in the magazine 83. At the instant that the leading edge. of the bag reaches the bottom of the magazine the fingers 48 are raised by cam 4 and are then'helcl in raised position until they engage another blank at transfer roll 45. The

finished bags are retainedin upright position be-' H tween the stripper fingers 82 and a receding; pressing anvil 84, by which the finished bags with the applied patches are held in the magazine until the adhesive finally sets.

vThe foregoing embodiment of the invention may be preferred for reasons of lack of horizontal space and freedom of vertical arrangement in the bag plant, or may be made necessary by reason of the'arrangement and type of bag tubing and diamond-folding mechanism available in the bag plant. may be more desirable by reason of a different plant arrangement, but nevertheless embodies a practical, working arrangement having the same.

advantages as the previous form, but operating The following form of the invention in a different sequence. The machine of the sec- 0nd embodiment is shown in Figs. 2 and 3 and the sequence of operation is shown in Fig. 5.

Referring to these figures, there-is diagrammatically disclosed a former 30 about which a I At I04 the blanks 20 are provided tangentially to the tapes 25'. The patch applying cylinder 55, is supplied with patches 10 cut from a web 56' drawn from a roll 51' of the patch material by pairs of feed rolls 58 and 53'. The

web is drawn about a slack providing roll BI operated by a cam I132 fixed to a knife carrier I 63' so that slack is provided in the web 56' at the instant of cutting.

rotating blade 64 which cooperates with a mov- The knife carrier carries a able blade 65 operated by a cam 66' also fixed to L. the knife carrier. As the patch I is severedfrom raised by cam 13 into a recess 14 provided in a" the-web it is fed between the surfaceof the knife carrier and traveling tapes I I "which grip the longitudinal edges of the patch and present the leading edge of, the patch beneath the finger I2 carried by the patch applying cylinder 55'. and

.operated'by a stationary cam 13" in the manner previously described. As the patchtravels about the surface of the cylinder 55' it is provided with adhesive by an applying roll. 16' engaging a fountain roll TI". As the finger comes into engagement with the leading edge of a bag it is pressing roll I05. The mechanism is timed to adhere the patch to the lower surface of the foremost point of the diamond fold. The bag is then progressed between the tapes25 and 1! until the tapes I! return to the patch forming,

mechanism and the bag is then gripped'between tapes 25' and a lower feeding belt I). ,As the bag is progressed it passes beneath an adhesive 'applier III rotating into periodic engagement with a fountain roll I I2 andapplying adhesive as at 22 .to the surface of the diamond fold. Belts. H3 extend close to the surface of a. crimping drum 21" which is provided with a clamping sur-' face 35, a clamping finger 35, a finger operating cam follower 3i engaging afixed cam 38, and

a set of rubber bars 39 similar to and for the purposes of corresponding parts described in connection with the crimping drum 21. The tapes 25 are guided partially around the surface of drum 2'! and engage theouter edges of the bag as previously described. Crimping blades 29' mounted upon a shaft '30 providetransverse creases 3i and 32 which define upstanding points 33 and 34 in the diamond folded portion ofthe bag, the foremost crease 3| being gripped between the surface 35' and the finger 36 positively to progress the bag. Spaced chains 40' I guided about the surfaceof shaft 30" and a guide roll '42 carry a bar 4| which is traveling at a higher rate of speed than the bag and which whips the trailing point 34 down onto the interrnediate portion of the diamond-folded end as previously described. Tapes 25' are guided about a roll I i5 positioned closely'adjacent to the surface of drum 21' and thereafter return to the initial position. The foremost point 33 with the attached patch Ill, which is held in substantially plying cylinder 55 of Fig. l, or 55 of Fig. 2; and

comprises suction operated means for engaging and applying the patch to the bag. A drum I20 is provided with grooves I 2| within which the patch feeding tapes II are guided while passing about the drum. Theshaft I22 is providedwith a passage I23 communicating with a chamber 124 fixedto the inner surface of the drum. The chamber communicates with the outer surface of the drum through a line of perforations I25 extending longitudinally of the drum. I The passage I23 communicates with a conduit I26 extending to a vacuum pump or other means for producing suction'within the chamber I24. A by-pass I21 communicates with an opening I28 in acollar r29 during a portion of the cycle of rotation as shown in Fig. 9. As theleading edge of a patch Ill is presented to the drum I2!) by the tapes II and knife carrier 63 the by-pass I2'I is locked by the solid portion of collar I29,'as.shown, and the immediate differential inpressure within the chamber I24 causes the leading'edg e of the patch to be fed by the drum until the by-pass again reaches the opening I28, at which time the patch has been adhered to the leading point 33 of the Q the bottom of the diamond, fold (Fig. 4) or to bag (Fig. 5)

Having described the illustrated embodiments of my invention it will be readily apparent to.

those skilled in the art that other modifications in arrangement and detail may be substituted for-those shown. All-such alterations, modifications and rearrangements as come within the scope of the following claims .are apart of. my

invention.

. I claim: t I r 1. In" a machine formanufacturing satchel:-

bottom bags, a crimping drum having spaced belts passing partially thereabout for holding the longitudinal edges of a diamond-folded bag blank against the surface of the drum, said drum being provided with clamping means and a resilient block in spaced relation, in combination with a pair of creasing blades mounted adjacent the surface of said drum, the foremost of said blades being adapted transversely to crease the foremost point of the diamond-fold and to tuck the crease so formed into said clamping means and the second of said creasing blades being adapted transversely to crease the trailing point of the diamond-fold by pressing the same against said resilient block.

2. In a. machine for manufacturing satchelbottom bags, acrimping drum having spaced belts passing partially thereabout for holding the longitudinal edges of a diamond-folded'bag blank against the surface of the drum, said drum being provided with clamping means and a resilient block in spaced relation, in combination with a pair of creasing blades mounted adjacent the surface of said drum, the foremost of said blades being adapted transversely to crease the foremost point of the diamond-fold and to tuck the crease so formed into said clamping means and the second. of said creasing blades being adapted transversely to crease the trailing point of the diamond-fold by pressing the same against said resilient block, and means traveling faster than said bag blank to overtake and whip the trailing point down onto the intermediate portion of the diamond-fold. 1

3. In a machine for manufacturing satchelbottom bags, a crimping drum having spaced belts passing partially thereabout for holding the longitudinal edges of a diamond-foldedbag blank against the surface of the drum, said drum being provided with clamping means and a resilient block in spaced relation, in combination with a pair of creasing blades mounted adjacent the surface of said drum, the foremost of said blades being adapted transversely to crease the foremost point of the diamond-fold and to tuck the crease so formed into said clamping means and the second of said creasing blades being adapted transversely to crease the trailing point of the diamond-fold by pressing the same against said resilient block, means traveling faster than said bag blank to overtake and whip the trailing point down onto the intermediate portion of the diamond-fold, a roll adjacent said crimping drumpresenting therewith converging traveling surfaces adapted to fold the foremost point of said diamond-fold into overlapping relation with the trailing point.

4. In a machine for manufacturing satchelbottom bags, a crimping drum having spaced belts passing partially thereabout for holding 'the longitudinal edges of a diamond-folded bag blank against the surface of the drum, said drum being provided with clamping means and a resilient block in spaced relation, in combination with a pair of creasing blades mounted adjacent the surface of said drum, the foremost of said blades being adapted transversely to crease the foremost point. of the diamond-fold and to tuck the crease so formed into said clamping means and the second of said creasing blades being adapted transversely to crease the trailing point of the diamond-fold by pressing the same against said resilient block, means traveling faster than said bag blank to overtake and Whip the said trailing point down onto the intermediate portion of the diamond-fold,- a roll adjacent said crimping drum presenting therewith converging traveling ;su'r-- faces adapted to fold the foremost point of said diamond-fold into overlapping relation withthe trailing point, and means subsequent thereto forg" affixing a patch to the bag so as to cover said overlapped points.

5. In a machinewfor manufacturing satchel-1 bottom bags; a crimping drum having spaced belts passing partially thereabout for holding-the longitudinal edges'of a diamond-folded bag blank against the surface of the drum, said drum being provided With"c1amping means and aresilientblock in spaced relation, in combination with a pair of creasing blades mounted adjacent the mond-fold by pressing the'same against saidlre points.

LUDWIG BISCHOFE. 5

surface of said drum, the foremost of said blades being adaptedtransVersel-y to crease the foremost point of the diamondefold and to tuck the crease? so formed into said clarnpingmeans and the sec.- ond of said creasing blades being adapted transversely to crease the trailing point of the dia-f 

